A4-1 Function error
TV video error
Standard Repair Process
Established
date
Revised date
6/1
LED TV
Error
symptom
201
.
.
TV can’t search any
channel/no picture
6
ǃ
Function Trouble
˄
TV video
˅
Check input RF signal
Check the RF source
Check tuner power
Check power supply circuit
Check if IIC work
Check IIC circuit
Check IFP/IFN output signal
Check tuner and
peripheral components
Check the circuit from
tuner to U1(MSD3553)
N
Y
N
N
N
Y
Y
Y
2017
Summary of Contents for 28LJ400B
Page 38: ......
